I'm going to be that guy for a second, but I remember way back when Aquarius first came out. And I remember randomly just finding the album on youtube at the time, and it didn't have too many views... I was just immediately pulled in and I was so impressed with how inspired the band sounded. I liked it all man, the growls and the 'mm-bop-bop' included. For some reason I never expected them to become the giants that they are today, but I'm really glad that they found their stride and gained some serious popularity.
Aquarius holds a special place in my heart with them, but I would say that The Mountain is probably their greatest work so far. Just an extremely talented group, and I hope that they take the DT route and work hard throughout their career.